forked from dgraph-io/dgraph
/
admin.go
121 lines (107 loc) · 3.29 KB
/
admin.go
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/*
* Copyright (C) 2017 Dgraph Labs, Inc. and Contributors
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package server
import (
"context"
"fmt"
"io/ioutil"
"net"
"net/http"
"os"
"strconv"
"github.com/dgraph-io/dgraph/edgraph"
"github.com/dgraph-io/dgraph/posting"
"github.com/dgraph-io/dgraph/worker"
"github.com/dgraph-io/dgraph/x"
)
// handlerInit does some standard checks. Returns false if something is wrong.
func handlerInit(w http.ResponseWriter, r *http.Request) bool {
if r.Method != http.MethodGet {
x.SetStatus(w, x.ErrorInvalidMethod, "Invalid method")
return false
}
ip, _, err := net.SplitHostPort(r.RemoteAddr)
if err != nil || !net.ParseIP(ip).IsLoopback() {
x.SetStatus(w, x.ErrorUnauthorized, fmt.Sprintf("Request from IP: %v", ip))
return false
}
return true
}
func shutDownHandler(w http.ResponseWriter, r *http.Request) {
if !handlerInit(w, r) {
return
}
shutdownServer()
w.Header().Set("Content-Type", "application/json")
w.Write([]byte(`{"code": "Success", "message": "Server is shutting down"}`))
}
func shutdownServer() {
x.Printf("Got clean exit request")
sdCh <- os.Interrupt
}
func exportHandler(w http.ResponseWriter, r *http.Request) {
if !handlerInit(w, r) {
return
}
ctx := context.Background()
// Export logic can be moved to dgraphzero.
if err := worker.ExportOverNetwork(ctx); err != nil {
x.SetStatus(w, err.Error(), "Export failed.")
return
}
w.Header().Set("Content-Type", "application/json")
w.Write([]byte(`{"code": "Success", "message": "Export completed."}`))
}
func memoryLimitHandler(w http.ResponseWriter, r *http.Request) {
switch r.Method {
case http.MethodGet:
memoryLimitGetHandler(w, r)
case http.MethodPut:
memoryLimitPutHandler(w, r)
default:
w.WriteHeader(http.StatusMethodNotAllowed)
}
}
func memoryLimitPutHandler(w http.ResponseWriter, r *http.Request) {
body, err := ioutil.ReadAll(r.Body)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
memoryMB, err := strconv.ParseFloat(string(body), 64)
if err != nil {
http.Error(w, err.Error(), http.StatusBadRequest)
return
}
if memoryMB < edgraph.MinAllottedMemory {
w.WriteHeader(http.StatusBadRequest)
fmt.Fprintf(w, "memory_mb must be at least %.0f\n", edgraph.MinAllottedMemory)
return
}
posting.Config.Mu.Lock()
posting.Config.AllottedMemory = memoryMB
posting.Config.Mu.Unlock()
w.WriteHeader(http.StatusOK)
}
func memoryLimitGetHandler(w http.ResponseWriter, r *http.Request) {
posting.Config.Mu.Lock()
memoryMB := posting.Config.AllottedMemory
posting.Config.Mu.Unlock()
if _, err := fmt.Fprintln(w, memoryMB); err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
}
}